34.19% is the change from 664 to 891
Calculation steps:
[( 891 - 664 ) ÷ 664] x 100 = 34.19%
Formula
Percentage change = [(891 - 664) / 664] x 100
Subtract the new number by the original number
891 - 664 = 227
227 ÷ 664 = 0.34186746987951805
0.34186746987951805 x 100 = 34.19%